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AI and Data

What Is a Foundation Model?

A large, general-purpose AI model trained on broad data that other products are built on top of. Most LLMs are foundation models.

Legal Tech GlossaryBy The Circle Desk

Why It Matters

When a legal AI vendor says it is model-agnostic, it means it can swap the foundation model underneath. That matters because models improve quickly, and a product locked to one model can fall behind or change behavior when that model is updated.

Related Terms

LLM (large language model)
The type of AI model behind ChatGPT, Claude, Gemini and most legal AI assistants, trained on very large amounts of text to predict and generate language.
Fine-tuning
Further training an existing AI model on a narrower set of examples, such as legal documents, so it performs better on that kind of work.
AI wrapper
A product that adds an interface, prompts and workflows on top of someone else's AI model rather than building its own model.

General information, not legal advice. Part of the Legal Tech Glossary, 173 terms in plain English.